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Cao B, Huang Y, Chen L, Jia W, Li D, Jiang Y. Soft bioelectronics for diagnostic and therapeutic applications in neurological diseases. Biosens Bioelectron 2024; 259:116378. [PMID: 38759308 DOI: 10.1016/j.bios.2024.116378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2024] [Revised: 04/13/2024] [Accepted: 05/09/2024] [Indexed: 05/19/2024]
Abstract
Physical and chemical signals in the central nervous system yield crucial information that is clinically relevant under both physiological and pathological conditions. The emerging field of bioelectronics focuses on the monitoring and manipulation of neurophysiological signals with high spatiotemporal resolution and minimal invasiveness. Significant advances have been realized through innovations in materials and structural design, which have markedly enhanced mechanical and electrical properties, biocompatibility, and overall device performance. The diagnostic and therapeutic potential of soft bioelectronics has been corroborated across a diverse array of pre-clinical settings. This review summarizes recent studies that underscore the developments and applications of soft bioelectronics in neurological disorders, including neuromonitoring, neuromodulation, tumor treatment, and biosensing. Limitations and outlooks of soft devices are also discussed in terms of power supply, wireless control, biocompatibility, and the integration of artificial intelligence. This review highlights the potential of soft bioelectronics as a future platform to promote deciphering brain functions and clinical outcomes of neurological diseases.
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Affiliation(s)
- Bowen Cao
- Department of Neurosurgery, Beijing Tiantan Hospital, National Center for Neurological Disorders, Capital Medical University, Beijing, China; Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, United States
| | - Yewei Huang
- Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, United States
| | - Liangpeng Chen
- Department of Neurosurgery, Beijing Tiantan Hospital, National Center for Neurological Disorders, Capital Medical University, Beijing, China
| | - Wang Jia
- Department of Neurosurgery, Beijing Tiantan Hospital, National Center for Neurological Disorders, Capital Medical University, Beijing, China; Beijing Neurosurgical Institute, Capital Medical University, Beijing, China; China National Clinical Research Center for Neurological Diseases (NCRC-ND), Beijing, China.
| | - Deling Li
- Department of Neurosurgery, Beijing Tiantan Hospital, National Center for Neurological Disorders, Capital Medical University, Beijing, China; Beijing Neurosurgical Institute, Capital Medical University, Beijing, China; China National Clinical Research Center for Neurological Diseases (NCRC-ND), Beijing, China.
| | - Yuanwen Jiang
- Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, United States.
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Niemczyk K, Pobożny I, Bartoszewicz R, Morawski K. Intraoperative Hearing Monitoring Using ABR and TT-ECochG and Hearing Preservation during Vestibular Schwannoma Resection. J Clin Med 2024; 13:4230. [PMID: 39064270 PMCID: PMC11278406 DOI: 10.3390/jcm13144230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2024] [Revised: 07/16/2024] [Accepted: 07/17/2024] [Indexed: 07/28/2024] Open
Abstract
Background: Quick and appropriate diagnostics and the use of intraoperative monitoring (IM) of hearing during vestibular schwannoma (VS) resection increase the likelihood of hearing preservation. During surgery, various methods of IM can be used, i.e., auditory brainstem responses (ABRs), transtympanic electrocochleography (TT-ECochG), and direct cochlear nerve action potentials. The aim of the study was to evaluate the prognostic values of IM of hearing using ABR and TT-ECochG in predicting postoperative hearing preservation and to evaluate relationships between them during various stages of surgery. Methods: This retrospective study presents the pre- and postoperative audiological test results and IM of hearing records (TT-ECochG and ABR) in 75 (43 women, 32 men, aged 18-69) patients with diagnosed VS. Results: The preoperative pure tone average hearing threshold was 25.02 dB HL, while after VS resection, it worsened on average by 30.03 dB HL. According to the American Academy of Otolaryngology-Head and Neck Surgery (AAO-HNS) Hearing Classification, before and after (pre/post) surgery, there were 47/24 patients in hearing class A, 9/8 in B, 2/1 in C, and 17/42 in D. In speech audiometry, the average preoperative speech discrimination score at an intensity of 60 dB SPL was 70.93%, and after VS resection, it worsened to 38.93%. The analysis of electrophysiological tests showed that before the tumor removal the I-V ABR interlatencies was 5.06 ms, and after VS resection, it was 6.43 ms. Conclusions: The study revealed correlations between worse postoperative hearing and changes in intraoperatively measured ABR and TT-ECochG. IM of hearing is very useful in predicting postoperative hearing in VS patients and increases the chance of postoperative hearing preservation in these patients.
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Affiliation(s)
- Kazimierz Niemczyk
- Department of Otorhinolaryngology Head and Neck Surgery, Medical University of Warsaw, 02-091 Warsaw, Poland
| | - Izabela Pobożny
- Department of Otorhinolaryngology Head and Neck Surgery, Medical University of Warsaw, 02-091 Warsaw, Poland
| | - Robert Bartoszewicz
- Department of Otorhinolaryngology Head and Neck Surgery, Medical University of Warsaw, 02-091 Warsaw, Poland
| | - Krzysztof Morawski
- Department of Otorhinolaryngology, Institute of Medical Sciences, University of Opole, 45-040 Opole, Poland
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Herrada J, Medel V, Dragicevic C, Maass JC, Stott CE, Delano PH. A frequency peak at 3.1 kHz obtained from the spectral analysis of the cochlear implant electrocochleography noise. PLoS One 2024; 19:e0299911. [PMID: 38451925 PMCID: PMC10919660 DOI: 10.1371/journal.pone.0299911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Accepted: 02/17/2024] [Indexed: 03/09/2024] Open
Abstract
INTRODUCTION The functional evaluation of auditory-nerve activity in spontaneous conditions has remained elusive in humans. In animals, the frequency analysis of the round-window electrical noise recorded by means of electrocochleography yields a frequency peak at around 900 to 1000 Hz, which has been proposed to reflect auditory-nerve spontaneous activity. Here, we studied the spectral components of the electrical noise obtained from cochlear implant electrocochleography in humans. METHODS We recruited adult cochlear implant recipients from the Clinical Hospital of the Universidad de Chile, between the years 2021 and 2022. We used the AIM System from Advanced Bionics® to obtain single trial electrocochleography signals from the most apical electrode in cochlear implant users. We performed a protocol to study spontaneous activity and auditory responses to 0.5 and 2 kHz tones. RESULTS Twenty subjects including 12 females, with a mean age of 57.9 ± 12.6 years (range between 36 and 78 years) were recruited. The electrical noise of the single trial cochlear implant electrocochleography signal yielded a reliable peak at 3.1 kHz in 55% of the cases (11 out of 20 subjects), while an oscillatory pattern that masked the spectrum was observed in seven cases. In the other two cases, the single-trial noise was not classifiable. Auditory stimulation at 0.5 kHz and 2.0 kHz did not change the amplitude of the 3.1 kHz frequency peak. CONCLUSION We found two main types of noise patterns in the frequency analysis of the single-trial noise from cochlear implant electrocochleography, including a peak at 3.1 kHz that might reflect auditory-nerve spontaneous activity, while the oscillatory pattern probably corresponds to an artifact.
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Affiliation(s)
- Javiera Herrada
- Servicio Otorrinolaringología, Hospital Clínico de la Universidad de Chile, Santiago, Chile
| | - Vicente Medel
- Departamento de Neurociencia, Facultad de Medicina, Universidad de Chile, Santiago, Chile
- Latin American Brain Health Institute (BrainLat), Universidad Adolfo Ibáñez, Santiago, Chile
| | - Constantino Dragicevic
- Departamento de Neurociencia, Facultad de Medicina, Universidad de Chile, Santiago, Chile
- Departamento de Fonoaudiología, Facultad de Medicina, Universidad de Chile, Santiago, Chile
| | - Juan C. Maass
- Servicio Otorrinolaringología, Hospital Clínico de la Universidad de Chile, Santiago, Chile
| | - Carlos E. Stott
- Servicio Otorrinolaringología, Hospital Clínico de la Universidad de Chile, Santiago, Chile
| | - Paul H. Delano
- Servicio Otorrinolaringología, Hospital Clínico de la Universidad de Chile, Santiago, Chile
- Departamento de Neurociencia, Facultad de Medicina, Universidad de Chile, Santiago, Chile
- Centro Avanzado de Ingeniería Eléctrica y Electrónica, AC3E, Universidad Técnica Federico Santa María, Valparaíso, Chile
- Biomedical Neuroscience Institute, Facultad de Medicina, Universidad de Chile, Santiago, Chile
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Hochet B, Daoudi H, Lefevre E, Nguyen Y, Bernat I, Sterkers O, Lahlou G, Kalamarides M. Monitoring Cochlear Nerve Action Potential for Hearing Preservation in Medium/Large Vestibular Schwannoma Surgery: Tips and Pitfalls. J Clin Med 2023; 12:6906. [PMID: 37959371 PMCID: PMC10650419 DOI: 10.3390/jcm12216906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Revised: 10/27/2023] [Accepted: 10/30/2023] [Indexed: 11/15/2023] Open
Abstract
The diagnosis of large vestibular schwannomas (VS) with retained useful hearing has become increasingly common. Preservation of facial nerve (FN) function has improved using intraoperative EMG monitoring, hearing preservation remains challenging, with the recent use of cochlear nerve action potential (CNAP) monitoring. This prospective longitudinal series of VS with useful hearing operated on using a retrosigmoid approach included 37 patients with a mean largest extrameatal VS. diameter of 25 ± 8.7 mm (81% of Koos stage 4). CNAP was detected in 51% of patients, while auditory brainstem responses (ABR) were present in 22%. Patients were divided into two groups based on the initial intraoperative CNAP status, whether it was present or absent. FN function was preserved (grade I-II) in 95% of cases at 6 months. Serviceable hearing (class A + B) was preserved in 16% of the cases, while 27% retained hearing with intelligibility (class A-C). Hearing with intelligibility (class A-C) was preserved in 42% of cases when CNAP could be monitored in the early stages of VS resection versus 11% when it was initially absent. Changes in both the approach to the cochlear nerve and VS resection are mandatory in preserving CNAP and improve the rate of hearing preservation.
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Affiliation(s)
- Baptiste Hochet
- Département d’Oto-Rhino-Laryngologie, Groupe Hospitalo-Universitaire Pitié-Salpêtrière, APHP, Sorbonne Université, 75013 Paris, France (O.S.); (G.L.)
| | - Hannah Daoudi
- Département d’Oto-Rhino-Laryngologie, Groupe Hospitalo-Universitaire Pitié-Salpêtrière, APHP, Sorbonne Université, 75013 Paris, France (O.S.); (G.L.)
- Technologies and Gene Therapy for Deafness, Institut de l’Audition/Institut Pasteur, 75012 Paris, France
| | - Etienne Lefevre
- Département de Neurochirurgie, Groupe Hospitalo-Universitaire Pitié-Salpêtrière, APHP, Sorbonne Université, 75013 Paris, France; (E.L.)
| | - Yann Nguyen
- Département d’Oto-Rhino-Laryngologie, Groupe Hospitalo-Universitaire Pitié-Salpêtrière, APHP, Sorbonne Université, 75013 Paris, France (O.S.); (G.L.)
- Technologies and Gene Therapy for Deafness, Institut de l’Audition/Institut Pasteur, 75012 Paris, France
| | - Isabelle Bernat
- Département de Neurophysiologie, Groupe Hospitalier Pitié-Salpétrière, APHP, Sorbonne Université, 75013 Paris, France
| | - Olivier Sterkers
- Département d’Oto-Rhino-Laryngologie, Groupe Hospitalo-Universitaire Pitié-Salpêtrière, APHP, Sorbonne Université, 75013 Paris, France (O.S.); (G.L.)
- Technologies and Gene Therapy for Deafness, Institut de l’Audition/Institut Pasteur, 75012 Paris, France
| | - Ghizlene Lahlou
- Département d’Oto-Rhino-Laryngologie, Groupe Hospitalo-Universitaire Pitié-Salpêtrière, APHP, Sorbonne Université, 75013 Paris, France (O.S.); (G.L.)
- Technologies and Gene Therapy for Deafness, Institut de l’Audition/Institut Pasteur, 75012 Paris, France
| | - Michel Kalamarides
- Département de Neurochirurgie, Groupe Hospitalo-Universitaire Pitié-Salpêtrière, APHP, Sorbonne Université, 75013 Paris, France; (E.L.)
- CRICM INSERM U1127 CNRS UMR 7225, Paris Brain Institute, Genetics and Development of Brain Tumors, 75013 Paris, France
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Pobożny I, Lachowska M, Bartoszewicz R, Niemczyk K. Detailed insight into transtympanic electrocochleography (TT-ECochG) and direct cochlear nerve action potential (CNAP) for intraoperative hearing monitoring in patients with vestibular schwannoma - methodology of measurements and interpretation of results. Otolaryngol Pol 2021; 74:1-8. [PMID: 33408268 DOI: 10.5604/01.3001.0014.3668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
<b>Background:</b> The aim was to present the methodology and interpretation of intraoperative hearing monitoring with simultaneous Transtympanic Electrocochleography (TT-ECochG) and direct Cochlear Nerve Action Potential (CNAP) measurements during vestibular schwannoma removal. <br><b>Materials and Methods:</b> Detailed methodology of measurements and interpretation of results are presented in three exemplary patients who underwent tumor removal via middle fossa approach (MFA) with the use of intraoperative monitoring of hearing with TT-ECochG and direct CNAP performed in real time. In addition, all responses were automatically recorded and stored along with surgical information and subjected to detailed analyses and calculation after surgery. <br><b>Results:</b> The following changes in TT-ECochG and direct CNAP responses were observed: Patient #1 - TT-ECochG and CNAP responses with minor, but transient, morphology changes (hearing was preserved); Patient #2 - CNAP responses changed significantly but, temporarily, from triphasic into biphasic responses later, with marked but partially reversible desynchronization of CNAP; changes in TT-ECochG responses were also observed but, at the end, returned to baseline (surgery-related deterioration of hearing); Patient #3 - irreversible changes of TT-ECochG and direct CNAP (complete loss of hearing). <br><b>Conclusions:</b> A combination of TT-ECochG and direct CNAP allows for real-time monitoring of auditory function during vestibular schwannoma resection and surgical manipulation which contribute to the risk of hearing loss. Therefore, the surgeon can be instantly informed about changes which could increase the possibility of preserving the patient's hearing.
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Affiliation(s)
- Izabela Pobożny
- Department of Otorhinolaryngology, Head and Neck Surgery, Medical University of Warsaw, Poland
| | - Magdalena Lachowska
- Katedra i Klinika Otorynolaryngologii Chirurgii Głowy i Szyi, Warszawski Uniwersytet Medyczny
| | - Robert Bartoszewicz
- Department of Otorhinolaryngology, Head and Neck Surgery, Medical University of Warsaw, Poland
| | - Kazimierz Niemczyk
- Department of Otorhinolaryngology, Head and Neck Surgery, Medical University of Warsaw, Poland
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